Canon iR C3380 series, Service Manual

Page: 310 / 610

Chapter 9
9-4
T-9-3
*1 heavy paper: heavy paper (106 to 169 g/m2), bond paper (64 to 105 g/m2), coated paper (106 to 169 g/m2), label
*2 heavy paper(strong): extra heavy paper (170 to 220 g/m2), extra heavy coated paper (170 to 220 g/m2), postcard, 2-pane card, 4-pane card, envelope
*3 For details of special fixing mode 2 settings, see user's guide.
C. Sheet-to-Sheet Temperature Control
If the distance between sheets for fixing is greater than indicated*, the machine executes sheet-to-sheet temperature control using a temperature lower than that used
for printing temperature control. It also uses this mechanism if no paper arrives for a specific period of time after start-up. The target temperature used for sheet-to-
sheet printing control is -30 to -50 C deg of the temperature used for printing temperature control.
* When the following is true:
- small paper size down sequence
- between 1st side and 2nd side of a double-sided print
- when a command arrives (ATR control, registration control, ATVC control)
D. Temperature Control when Resizing the Paper Size during Down-Sequence Control
The down sequence control is continued as it is when changing to a small size when the down sequence is being controlled. The power supply to the heater and
driving the fixing system are stopped once when changing to the size of the form of A4R or more. It shifts to a usual start-up control after the sub-thermistor detects
under 150 deg C or 30 seconds pass, and the size after it changes is printed.
Service Mode:
COPIER > OPTION > BODY > P-CGH-TM
Default: 0
Resets the temperature at which job is restarted and the amount of time required before the restart when the paper size is changed to larger sizes (A4R or wider)
during down-sequence control.
T-9-4
Enter a greater entry if reducing the downtime during paper size switchover is desired. Enter a smaller entry to prevent hot offset immediately after the switchover.
9.2.1.4 Fixing film edge cooling control
0014-5559
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
In the case of continuous prints of the size paper (the width less than A3NC, and as large as A4NC or more), if the sub thermistor detection temperature of the fixing
film reaches to the specified temperature, it executes temperature control to prevent the edge temperature rise by feeding air from the 2 cooling fans to the fixing
film edge. Thanks to this, it prevents film deterioration by heating of the fixing film edge.
1. Shutter Fan Position Drive Control
The duct that passes air has a shutter mechanism to enable sending air to the ideal area of the fixing film by opening/closing the shutter by 6 steps (from full-close
to full-open) according to the paper size. The shutter opening/closing position that corresponds the paper size has 7-point (A4R, LTRR, B4, EXE, K8, LTR, home
position).
Open/close positions of the shutter is detected by the fan shutter HP sensor (PS28) and fan shutter position sensor (PS29). When sub-thermistor 1 (TH2) detects
temperature listed below, fan shutter motor (M15) is rotated until the fan shutter HP sensor detects the shutter. And then, positive rotation of the fan shutter motor
(M15) is initiated and the shutter is moved to a position corresponds to the paper size chosen. The fan shutter motor is reversely rotated in the last-rotation period,
and the shutter is returned to the home position. If paper size is changed during continuous printing, the shutter is returned to its home position first and then the
shutter is moved to a position corresponds to the paper size chosen.
Speed Paper type User setting
Range of temperature adjustment
(Ambient Temperature and Humidity /
Low Temperature and Humidity) (deg
C)
Normal speed plain paper (64 to 105 g/m2) plain paper 220 to 200/225 to 200
thin paper (less than 64 g/m2) plain paper L 210 to 185/215 to 190
special fixing mode 2 *3 iRC3380
special printing process
>plain paper
>mode 2
iRC2880
process option
>specific fixing mode
>mode 2
235 to 210/240 to 220
Half speed plain paper (64 to 105 g/m2) plain paper 190 to 165/200 to 175
thin paper (less than 64 g/m2) plain paper L 180 to 155/190 to 165
rough paper *1 heavy paper 1 205 to 185/215 to 195
rough paper (strong) *2 heavy paper 2 220 to 200/225 to 205
special fixing mode 2 *3 iRC3380
special printing process
>plain paper
>mode 2
iRC2880
process position
>special fixing mode
>mode 2
200 to 175/205 to 180
1/4 Speed OHT OHT 175 to 150/185 to 165
Entry -2 -1 0 1 2
Temperature at Return 125 138 150 175 200
Time Before Return 90 90 30 30 30